virtue signallingnoun [ U ]
UK US virtue signaling uk/ˈvɜː.tʃuː ˌsɪɡ.nəl.ɪŋ//ˈvɝː.tʃuː ˌsɪɡ.nəl.ɪŋ/an attempt to show other people that you are a good person, for example by expressing opinions that will be acceptable to them, especially on social media:
Virtue signalling is the popular modern habit of indicating that one has virtue merely by expressing disgust or favour for certain political ideas or cultural happenings.